/*
 * Copyright (C) 2013 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.squareup.picasso;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

import java.io.IOException;

import static android.content.ContentResolver.SCHEME_ANDROID_RESOURCE;
import static com.squareup.picasso.Picasso.LoadedFrom.DISK;

class ResourceRequestHandler extends RequestHandler {
	private static Cache mCache;
	private final Context context;

	ResourceRequestHandler(Context context) {
		this.context = context;
	}

	@Override
	public boolean canHandleRequest(Request data) {
		if (data.resourceId != 0) {
			return true;
		}

		return SCHEME_ANDROID_RESOURCE.equals(data.uri.getScheme());
	}

	@Override
	public Result load(Request data, Cache cache) throws IOException {
		mCache = cache;
		Resources res = Utils.getResources(context, data);
		int id = Utils.getResourceId(res, data);
		return new Result(decodeResource(res, id, data), DISK);
	}

	private static Bitmap decodeResource(Resources resources, int id, Request data) {
		final BitmapFactory.Options options = createBitmapOptions(data);
		if (requiresInSampleSize(options)) {
			BitmapFactory.decodeResource(resources, id, options);
			calculateInSampleSize(data.targetWidth, data.targetHeight, options, data);
			RequestHandler.ensureMemory(options, mCache, data.config);
		}
		return BitmapFactory.decodeResource(resources, id, options);
	}
}
